python - 在python中执行基于特定时间间隔的任务

Question

我正在尝试根据设置打开和关闭 LED set_car_id在一个时间间隔内返回一些值。如果设置返回某个值，我希望 LED 更亮 8 秒。在下面显示的代码中，一旦设置返回一个值，LED 就会亮起 8 秒。但是，如果设置在 5 秒(在 8 秒内)返回一个值，那么 LED 直到接下来的 13 秒才会打开，它将再亮 3 秒，然后突然关闭。我只展示了代码的一小部分。有什么建议可以解决吗？

last_bright_time = None            
last_dim_time = None
new_action = -1
def LED_control(set_car_id):
    global last_bright_time
    global last_dim_time
    curr_time = time.time()
    should_remain_bright = False
    should_remain_dim = False
    if (new_action == 0):      #new_action ==0 corresponds to set_car_id returning some value
        if last_bright_time == None:
            last_bright_time = time.time()
        if  (curr_time - last_bright_time) < 8:
        should_remain_bright = True
    if  ((len(set_car_id) > 0) or should_remain_bright = True):
        car_light(1)                # function to bright the LED
        last_dim_time = None
    else:
         car_light(0)               # function to dim the LED
         last_bright_time = None

Answer 1

尝试这个:

import time
while True:
    brighten()
    time.sleep(8)
    dim()
    time.sleep(8)

如果你想要更精确的东西:

import time
def sleep():
    time_start = time.time()
    while time.time() < time_start + 8000:
        pass
while True:
    brighten()
    sleep()
    dim()
    sleep()

在上面的代码段中，您必须定义 brighten和 dim职能。